from flask import Flask, render_template, request, escape, session, copy_current_request_context
from vsearch import search4letters
from DBcm import UseDatabase, ConnectionError, CredentialsError, SQLError
from checker import check_logged_in
from threading import Thread


app = Flask(__name__)
app.secret_key = 'YouWillNeverGuessMySecretKey'

app.config['dbconfig'] = { 'host': '127.0.0.1',
                           'user': 'vsearch',
                           'password':'vsearchpasswd',
                           'database':'vsearchlogDB', }


@app.route('/search4', methods=['POST'])
def do_search() -> str:
    
    @copy_current_request_context
    def log_request(req: 'flask-request', res: str) -> None:
    """ Log details of the web request and the results."""
    with UseDatabase(app.config['dbconfig']) as cursor:
        _SQL = """insert into log
                    (phrase, letters, ip, browser_string, results)
                    values
                    (%s, %s, %s, %s, %s)"""
        cursor.execute(_SQL, (req.form['phrase'],
                              req.form['letters'],
                              req.remote_addr,
                              req.user_agent.browser,
                              res, ))
        
    phrase = request.form['phrase']
    letters = request.form['letters']
    title = 'Here are your results: '
    results = str(search4letters(phrase, letters))
    try:
        t = Thread(target=log_request, args=(request, results))
        t.start()
    except Exception as err:
        print('*****Logging failed with this error:', str(err))
    return render_template('results.html', the_title=title, the_phrase=phrase, the_letters=letters, the_results=results)

@app.route('/')
@app.route('/entry')
def entry_page() -> 'html':
    return render_template('entry.html', the_title='Welcome to search4letters on the web!')

@app.route('/viewlog')
@check_logged_in
def view_the_log() -> 'html':
    try:
        with UseDatabase(app.config['dbconfig']) as cursor:
            _SQL = """select phrase, letters, ip, browser_string, results from log"""
            cursor.execute(_SQL)
            contents = cursor.fetchall()
        titles = ('Phrase', 'Letters', 'Remote_addr', 'User_agnet', 'Results')
        return render_template('viewlog.html', the_title='View Log', the_row_titles=titles, the_data=contents)

    except ConnectionError as err:
        print('Is your database switched on? Error:', str(err))
    except CredentialsError as err:
        print('User-id/Password issues. Error:', str(err))
    except SQLError as err:
        print('Is your query correct? Error:', str(err))
    except Exception as err:
        print('Something went wrong:', str(err))
    return 'Error'
        
@app.route('/login')
def do_login() -> str:
    session['logged_in'] = True
    return 'You are now logged in'

@app.route('/logout')
def do_logout() -> str:
    session.pop('logged_in')
    return 'You are now logged out'

if __name__ == '__main__':
    app.run(debug=True)
